public link unit char {} = driver.char;
public link bit OS_time = driver.OS_time;
public link void OS_init(){} = driver.OS_init;
public link void OS_run(){} = driver.OS_run;
public link void OS_thread(){} = driver.OS_thread;
public link void (){} = driver.clear;
public link void յ_(bit n1){} = driver.clear_line;
public link void _е_ʾַ_(bit n1,bit n3,bit n5){} = driver.write_char;
public link void ʾ_С(bit n1){} = driver.show_point;
public link void ص_С(bit n1){} = driver.hide_point;
public link void ȫС(){} = driver.clear_point;
